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Two cool improvements are coming to <dialog> soon ™️. - button command/commandfor attributes to open dialogs without JS. - closedby attribute to enable light dismiss or disable close on esc (etc)

I believe @keithamus.social recently landed the spec change for dialogs to get a toggle event, matching popovers and details elements. That event would be fired when the command button is activated.

Yep - we have `beforetoggle` and `toggle` events instead. Shipped in Chrome and Firefox. TBD Safari